NEWBIE - Agile Web development Book - posting #3

Rails
1

1). regarding the book book “agile web development with rails 2nd
edition” , I am now on chapter 8, Task C+: Cart Creation, and I have
encountered a new bug in following the material.

as the book instructs, in order to resolve an migration issue to
display my depot application, I need to clear the session.So as
instructed , i issue the command ;

C:\rails\depot>rake db:sessions:clear

2). what i get is :

(in C:/rails/depot)
rake aborted!
Mysql::Error: #42S02Table ‘depot_development.sessions’ doesn’t exist:
DELETE FRO
M sessions

(See full trace by running task with --trace)

C:\rails\depot>

3). i researched previous postings on this, and found something
interesting from a “Peter Vandenberk” who writes:

From: joe - view profile
Date: Wed, Sep 13 2006 11:10 pm
Email: joe [email protected]
Not yet rated
Rating:
show options
Reply | Reply to Author | Forward | Print | Individual Message | Show
original | Report Abuse | Find messages by this author

Peter Vandenberk wrote:

That syntax is now deprecated in favor of adding the following
declaration in your model file:

include Reloadable

See also: http://clarkware.com/cgi/blosxom/2006/03/28

Let us know how it goes! :slight_smile:

Peter

3). THIS SOUNDS LIKE A SOLUTION , BUT I AM NOT SURE WHERE TO POST THIS
COMMAND IN THE MODELS. AND I CANT REPLY TO HIS POSTIGN BECAUSE ITS 30
DAYS OLD, AND GOOGLE WONT ALLOW IT.

4). WHAT CAN I DO ? WHY ISNT THE RAKE COMMAND WORKING? WHERE DO I
ISSUE TEH CODE SNIPPET - "INCLUDE RELOADABLE " TO GET IT TO WORK.

2

(in C:/rails/depot)
rake aborted!
Mysql::Error: #42S02Table ‘depot_development.sessions’ doesn’t exist:
DELETE FRO
M sessions

I don’t have my copy of the AWDWR book on this computer, but if memory
serves, you need to do:

rake db:sessions:create
rake db:migrate

Before the sessions table will exist, and thus, before you can clear it.

– Tammy

3

1). book doesnt inmention your suggestion , but i tried it anyway.
Here is what i get :

C:\rails\depot>rake db:sessions:clear
(in C:/rails/depot)
rake aborted!
Mysql::Error: #42S02Table ‘depot_development.sessions’ doesn’t exist:
DELETE FRO
M sessions

(See full trace by running task with --trace)

C:\rails\depot>rake db:sessions:create
(in C:/rails/depot)
exists db/migrate
create db/migrate/004_add_sessions.rb

C:\rails\depot>rake db:sessions:migrate
(in C:/rails/depot)
rake aborted!
Don’t know how to build task ‘db:sessions:migrate’

(See full trace by running task with --trace)

C:\rails\depot>rake db:sessions:clear
(in C:/rails/depot)
rake aborted!
Mysql::Error: #42S02Table ‘depot_development.sessions’ doesn’t exist:
DELETE FRO
M sessions

(See full trace by running task with --trace)

C:\rails\depot>

2). PLEASE HELP , PROBLEM NOT RESOLVED YET. WHY DOE IT SAY ‘DEPOT
DEVELOPMENT.SESSIONS DOESNT EXIST’, HOW CAN I RESOLVE?

4
  1. THAT WORKED
    BUT WHEN I DP I REFRESH ON MY ADD_TO_CART/2 website, I now i get :

NoMethodError in Store#add_to_cart
Showing app/views/store/add_to_cart.rhtml where line #10 raised:

undefined method `quantity’ for #Product:0x3916e98

Extracted source (around line #10):

7:
8:


    9: <% for cart_item in @cart.items %>
    10:
  • <%= cart_item.quantity %> × <%= h(cart_item.title)
    %>

    • 11: <% end %>
    12:

RAILS_ROOT: ./script/…/config/…

3). NOT SURE HOW TO HANDLE THIS ONE …

…

5

1). PLEASE DISREGARD MY LAST REPONSE. TAMMY’S SUGGESTION MADE ME
REALIZE THAT I MISSED THE BEGININNG OF THE SECTION OF TASK C , AND SO
DIDNT FOLLOW SOME OF THE BEGINNING WORK .

I SHOULD HAVE NO MORE PROBLEMS WITH ‘SESSIONS’ ONCE I REVIEW THE
ENTIRE SECTION .

STAY TUNED , AND THANKS …